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Chinese Chemical Letters 2020年第10期31卷 2774-2778页

作者： Wenjie He Xingxing Wu Yifei Li Jing Xiong zhiling Tang Yuechang Wei zhen zhao Xiao zhang Jian Liu State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Key Laboratory of Optical Detection Technology for Oil and Gas China University of PetroleumBeijing 102249China

The rapid recombination of photoinduced electron-hole pairs as well as the deficiency of high-energy carriers restricted the redox ability and products ***,the heterojunction of SnS_(2)-deco rated three-dimensional ordered macropores(3DOM)-SrTiO_(3) catalysts were in-situ constructed to provide transmit channel for high-energy electron *** suitable band edges of SnS_(2) and SrTiO_(3) contribute to the z-scheme transfer of photogenerated *** 3DOM structure of SrTiO_(3)-based catalyst possesses the slow light effect for enhancing light adsorption efficiency,and the surface alkalis strontium is benefit to the boosting adsorption for CO_(2).The in-situ introduced SnS_(2) decorated on the macroporous wall surface of 3DOM-SrTiO_(3) altered the primary product from CO to *** z-scheme electron transfer from SnS_(2) combining with the holes in SrTiO_(3) occurred under full spectrum photoexcitation,which improved the excitation and utilization of photogene rated electrons for C02 multi-electrons *** a result,(SnS_(2))3/3 DOM-SrTiO_(3) catalyst exhibits higher activity for photocatalytic CO_(2) reduction to CH4 compared with single SnS_(2) or 3 DOM-SrTiO_(3),i.e.,its yield and selectivity of CH4 are 12.5μmol g^(-1) h^(-1) and 74.9%,re *** present work proposed the theoretical foundation of z-scheme heterojunction construction for enhancing photocatalytic activity and selectivity for CO_(2) conversion.

关键词： 3DOM-SrTiO3 SnS_(2) z-scheme heterojunction CO_(2)conversion CH4 selectivity

Self-template-oriented synthesis of lead-free perovskite Cs_(3)Bi_(2)I_(9) nanosheets for boosting photocatalysis of CO_(2) reduction over z-scheme heterojunction Cs_(3)Bi_(2)I_(9)/CeO_(2)

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Journal of Energy Chemistry 2022年第6期31卷 348-355,I0010页

作者： You-Xiang Feng Guang-Xing Dong Ke Su zhao-Lei Liu Wen zhang Min zhang Tong-Bu Lu MOE International Joint Laboratory of Materials Microstructure Institute for New Energy Materials and Low Carbon TechnologiesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion School of Chemistry and Chemical EngineeringTianjin University of TechnologyTianjin 300384China

Lead halide perovskite (LHP) nanocrystals have been intensely studied as photocatalysts for artificial photosynthesis in recent ***,the toxicity of lead in LHP seriously limits their potential for widespread ***,we first present the synthesis of 2D lead-free halide perovskite (Cs_(3)Bi_(2)I_(9)) nanosheets with self-template-oriented method,in which BiOI/Bi_(2)O_(2) nanosheets were used as the template and Bi ion source *** facile electrostatic self-assembly strategy,a z-scheme heterojunction composed of Cs_(3)Bi_(2)I_(9)nanosheets and CeO_(2) nanosheets (Cs_(3)Bi_(2)I_(9)/CeO_(2)-3:1) was constructed as photocatalyst for the photo-reduction of CO_(2) coupled with the oxidation of H_(2)*** to the matching energy levels and the close interfacial contact between Cs_(3)Bi_(2)I_(9)and CeO_(2) nanosheets,the separation efficiency of the photogenerated carriers in Cs_(3)Bi_(2)I_(9)/CeO_(2)-3:1 composite was significantly ***,the environment-friendly halide perovskite heterojunction Cs_(3)Bi_(2)I_(9)/CeO_(2)-3:1presents impressive photocatalytic activity for the reduction of CO_(2)to CH_(4)and CO with an electron consumption yield of 877.04μmol g^(-1),which is over 7 and 15 times higher than those of pristine Cs_(3)Bi_(2)I_(9)and CeO_(2)nanosheets,exceeding the yield of other reported bismuth-based perovskite for photocatalytic CO_(2)reduction.

关键词： Lead-free perovskite z-scheme heterojunction Cs_(3)Bi_(2)I_(9)nanosheets Photocatalytic CO_(2)reduction H_(2)O oxidation

3D flower-like mesoporous Bi_(4)O_(5)I_(2)/MoS_(2)z-scheme heterojunction with optimized photothermal-photocatalytic performance

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Green Energy & Environment 2023年第1期8卷 200-212页

作者： Sijia Song zipeng Xing Ke Wang Huanan zhao Peng Chen zhenzi Li Wei zhou Department of Environmental Science School of Chemistry and Materials ScienceKey Laboratory of Functional Inorganic Material ChemistryMinistry of Education of the People's Republic of ChinaHeilongjiang UniversityHarbin150080China Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Chemical EngineeringQilu University of Technology(Shandong Academy of Sciences)JinanShandong250353China

3D flower-like hierarchical mesoporous Bi_(4)O_(5)I_(2)/MoS_(2)z-scheme layered heterojunction photocatalyst was fabricated by oil bath and hydrothermal *** heterojunction with narrow band gap of~1.95 eV extended the photoresponse to near-infrared region,which showed obvious photothermal effect due to the introduction of MoS_(2) with broad spectrum ***_(2) nanosheets were anchored onto the surface of flower-like hierarchical mesoporous Bi_(4)O_(5)I_(2) nanosheets,thereby forming efficient layered heterojunctions,the solar-driven photocatalytic efficiency in degradation of highly toxic dichlorophenol and reduction of hexavalent chromium was improved to 98.5%and 99.2%,which was~4 and 7 times higher than that of the pristine Bi_(4)O_(5)I_(2),*** addition,the photocatalytic hydrogen production rate reached 496.78 μmol h^(-1)g^(-1),which was~6 times higher than that of the pristine Bi_(4)O_(5)I_(2).The excellent photocatalytic performance can be ascribed to the promoted photothermal effect,as well as,the formation of compact z-scheme layered *** 3D flower-like hierarchical mesoporous structure provided adequate surface active-sites,which was conducive to the mass ***,the high stability of the prepared photocatalyst further promoted its potential practical *** strategy also provides new insights for fabricating layered zscheme heterojunctions photocatalysts with highly photothermal-photocatalytic efficiency.

关键词： Photocatalysis z-scheme heterojunction Bi4O5I2 MoS2 Photothermal effect

Construction of 3D/2D indium vanadate /graphite carbon nitride with nitrogen defects z-scheme heterojunction for improving photocatalytic carbon dioxide reduction

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Journal of Materials Science & Technology 2023年第23期154卷 129-139页

作者： Mingyi Yu Jianbo Wang Guojun Li Shule zhang Qin zhong School of Chemistry and Chemical Engineering Nanjing University of Science and TechnologyNanjing 210094China

Indium vanadate (InVO4 ) possesses excellent potential in photocatalytic carbon dioxide (CO_(2) ) reduction, but further modifications of reducing charge recombination and increasing active sites are still needed. Herein, InVO4 /g-C3 N4 (InVO-CN) heterojunction composite photocatalysts were prepared via in situ formation of InVO4 nanoparticles on the lamellar structure of graphite carbon nitride (g-C3 N4 ) containing nitrogen (N) defects. Among these composites, 30% InVO-CN showed the best photoreduction performance for CO_(2) at normal temperature and pressure without sacrificial agent (carbon monoxide, CO: 20.14 μmol g–1 h–1;methane, CH4 : 3.46 μmol g–1 h–1 ), which were 1.8 and 2.8 times higher than these of pure g-C3 N4 and InVO4 . The excellent performance could be attributed to the enhancement of CO_(2) adsorption, and most importantly, the enhanced charge carrier separation and reduction capacity induced by the formation of z-scheme heterojunction between InVO4 and g-C3 N4 . In this work, intimate heterojunction interfaces between materials were formed by introducing g-C3 N4 with defects in InVO4 , which provides a promising modification scheme.

关键词： z-scheme heterojunction CO_(2)photoreduction g-C3N4,InVO4

Coupled Cu doping and z-scheme heterojunction for synergistically enhanced tetracycline photodegradation

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Nano Research 2024年第7期17卷 5937-5948页

作者： Huidong Shen Chunming Yang Song Hong Leiduan Hao Liang Xu Alex W.Robertson zhenyu Sun Country State Key Laboratory of Organic-Inorganic Composites College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China Shaanxi Key Laboratory of Chemical Reaction Engineering College of Chemistry and Chemical EngineeringYan’an UniversityYan’an 716000China Department of Physics University of WarwickCoventry CV 47ALUK

Semiconductor-based photocatalysis by utilizing solar energy for sustainable organic pollutant elimination has been a promising tactic to alleviate environmental ***,the development of robust and efficient photocatalysts to degrade organic pollutants still faces major challenges because of insufficient charge *** we design and fabricate a heterojunction consisting of copper,carbon-modified TiO_(2),and sulfur-doped g-C_(3)N_(4)nanosheets(i.e.,S-C_(3)N_(4)/Cu/C-TiO_(2)).The heterostructure affords a remarkable synergistic photocatalysis for tetracycline hydrochloride degradation,achieving an 82.6%removal efficiency within 30 min under visible light irradiation,about 15.4 and 7.3 times higher than that of S-C_(3)N_(4)and C-TiO_(2),*** superior performance is attributed to the synergy between Cu doping and the z-scheme heterojunction,which not only enhances the interfacial electric field effect,facilitating charge separation,but also boosts the redox *** charge carrier transfer between Cu/C-TiO_(2)and S-C_(3)N_(4)follows a z-scheme,as verified by trapping experiments,electron spin-resonance spectroscopy,and density functional theory ***,the tetracycline hydrochloride degradation pathways are enunciated by liquid chromatograph mass spectrometry *** work provides an effective approach for constructing high-performance photocatalysts that have potential in environmental remediation.

关键词： photocatalysis Cu doping z-scheme heterojunction electrons and holes separation tetracycline degradation

znFe_(2)O_(4)/BiVO_(4)z-scheme heterojunction for efficient visible-light photocatalytic degradation of ciprofloxacin

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Frontiers of Chemical Science and Engineering 2023年第11期17卷 1728-1740页

作者： Beibei Wang Kejiang Qian Weiping Yang Wenjing An Lan-Lan Lou Shuangxi Liu Kai Yu MOE Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Technology for Complex Transmedia PollutionCollege of Environmental Science and EngineeringNankai UniversityTianjin 300350China Institute of New Catalytic Materials Science School of Materials Science and EngineeringNational Institute of Advanced MaterialsNankai UniversityTianjin 300350Chin

A novel z-scheme znFe_(2)O_(4)/BiVO_(4)heterojunction photocatalyst was successfully synthesized using a convenient solvothermal method and applied in the visible light photocatalytic degradation of ciprofloxacin,which is a typical antibiotic contaminant in *** heterostructure of as-synthesized catalysts was confirmed using X-ray diffraction,scanning electron microscopy,transmission electron microscopy and X-ray photoelectron spectroscopy *** with the singlephase counterparts,znFe_(2)O_(4)/BiVO_(4)demonstrated considerably enhanced photogenerated charge separation efficiencies because of the z-scheme transfer mechanism of electrons between the composite ***,the 30%znFe_(2)O_(4)/BiVO_(4)catalyst afforded a degradation rate of up to 97%of 20 mg/L ciprofloxacin under 30 min of visible light irradiation with a total organic carbon removal rate of 50%,which is an excellent activity compared with ever reported BiVO_(4)-based *** addition,the liquid chromatography-mass spectrometry and quantitative structure-activity relationships model analyses demonstrated that the toxicity of the intermediates was lower than that of the parent ***,the as-synthesized znFe_(2)O_(4)/BiVO_(4)heterojunctions were quite stable and could be reused at least four *** study thus provides a promising z-scheme heterojunction photocatalyst for the efficient removal and detoxication of antibiotic pollutants from wastewater.

关键词： znFe_(2)O_(4)/BiVO_(4) z-scheme heterojunction photocatalytic degradation ciprofloxacin

Bifunctional noble-metal-free cocatalyst coating enabling better coupling of photocatalytic CO_(2)reduction and H_(2)O oxidation on direct z-scheme heterojunction

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Nano Research 2024年第6期17卷 5022-5030页

作者： Wei zhao Weihao Mo Yan zhang Lingxuan Hu Yiyi zheng zhulei Chen Xiangyue Niu Yuling zhao Lichun Liu Shuxian zhong Song Bai Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Materials ScienceZhejiang Normal UniversityJinhua 321004China College of Biological Chemical Sciences and Engineering and Nanotechnology Research InstituteJiaxing UniversityJiaxing 314001China College of Geography and Environmental Sciences Zhejiang Normal UniversityJinhua 321004China College of Chemical and Biological Engineering Zhejiang UniversityHangzhou 310058China School of Biological and Chemical Engineering Panzhihua UniversityPanzhihua 617000China

Selective loading of spatially separated redox cocatalysts on direct z-scheme heterojunctions holds great promise for advancing the efficiency of artificial photosynthesis,which however is limited to the photodeposition of noble metal cocatalysts and the fabrication of hollow double-shelled semiconductor ***,the co-exposure of discrete cocatalyst and semiconductor increases the product diversity when both the exposed sites of which participate in CO_(2)***,we present a facile and versatile protocol to overcome these limitations via surface coating of z-scheme heterojunctions with bifunctional noble-metal-free *** Cu_(2)O/Fe_(2)O_(3)(CF)as a model heterojunction and layered Ni(OH)_(2)as a model cocatalyst,it is found that Ni(OH)_(2)lying on the surfaces of Cu_(2)O and Fe_(2)O_(3)separately co-catalyzes the CO_(2)reduction and H_(2)O *** experimental and theoretical investigation reveals that the Ni(OH)_(2)outer layer:(i)mitigates the charge recombination in CF and balances their transfer and consumption;(ii)reduces the rate-determining barriers for CO_(2)-to-CO and H_(2)O-to-O_(2)conversion,(iii)suppresses the side proton reduction occurring on CF,and(iv)protects the CF from component *** expected,the redox reactions stoichiometrically proceed,and significantly enhanced photocatalytic activity,selectivity,and stability in CO generation are achieved by the stacked Cu_(2)O/Fe_(2)O_(3)@Ni(OH)_(2)in contrast to *** study demonstrates the significance of the synergy between bifunctional cocatalysts and z-scheme heterojunctions for improving the efficacy of overall redox reactions,opening a fresh avenue for the rational design of artificial photosynthetic systems.

关键词： z-scheme heterojunction bifunctional cocatalyst CO_(2)reduction H_(2)O oxidation stoichiometric redox reaction

Ternary Ag/Ag3PO_(4)/MIL-125-NH2 z-scheme heterojunction for boosted photocatalytic Cr(Ⅵ)cleanup under visible light

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Chinese Chemical Letters 2020年第10期31卷 2645-2650页

作者： Yun-Cai zhou Peng Wang Huifen Fu Chen zhao Chong-Chen Wang Beijing Key Laboratory of Functional Materials for Building Structure and Environment Remediation Beijing University of Civil Engineering and ArchitectureBeijing 100044China

The binary Ag3 P04/MIL-125-NH2(AMN-X)composites were synthesized through ion exchange-solution method,and the ternary Ag/Ag3 PO_(4)/MIL-125-NH2(AAMN-X)z-scheme heterojunctions were prepared via the photo chemical reduction deposition *** photocatalytic hexavalent chromium(Cr(VI))sequestration over AMN-X and AAMN-X were investigated under visible ***-120 accomplished superior reduction performance due to that Ag nanoparticles(NPs)act as electrons transfer bridge to enhance the separation efficiency of photogenerated e-h+pairs,in which the reaction rates(***)were 2.77 and 124.2 fold higher than those of individual MIL-125-NH2 and Ag3 PO_(4),*** influences of different pH values,small organic acids and coexisting ions on the photocatalytic perfo rmance of AAMN-120 were also *** addition,the AAMN-120 heterojunction expressed great reusability and stability in cycling *** mechanism of photocatalytic Cr(VI)was investigated and verified through photoluminescence(PL),electrochemistry,electron spin resonance(ESR),active species capture,and Pt element deposition experiments.

关键词： MIL-125-NH2 Ag/Ag3PO4 Hexavalent chromium z-scheme heterojunction Photocatalysis

NiCo_(2)O_(4)/BiOCl/Bi_(24)O_(31)Br_(10) ternary z-scheme heterojunction enhance peroxymonosulfate activation under visible light: Catalyst synthesis and reaction mechanism

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Chinese Chemical Letters 2023年第3期34卷 186-190页

作者： Tianren Li Yueyu Song Jingjing Jiang Mingyu Li Yuhan Ma Shuangshi Dong Key Laboratory of Groundwater Resources and Environment Ministry of EducationJilin UniversityChangchun 130026China Jilin Provincial Key Laboratory of Water Resources and Environment Jilin UniversityChangchun 130026China

The z-scheme heterostructure for photocatalyst can effectively prolong the lifetime of photogenerated carriers and retain a higher conduction/valence band position,promoting the synergistic coupling of photocatalysis and peroxymonosulfate(PMS) *** order to fully utilize the luminous energy and realize the efficient activation of PMS,this work achieved successful construction of NiCo_(2)O_(4)/BiOCl/Bi_(24)O_(31)Br_(10) ternary z-scheme heterojunction by simultaneously synthesizing BiOCl and NiCo_(2)O_(4) with NiCl_(2) and CoCl_(2) as the *** intercalated BiOCl could serve as a carrier migration ladder to further achieve the spatial separation of electron-hole pairs,so that the oxidation and reduction processes separately occurred in different *** with the reported catalysts,the as-prepared composites exhibited the enhanced removal efficiency for tetracycline hydrochloride(TCH) in the visible light/PMS system,with a degradation efficiency of 85.30%in 2 min,and possessed good stability.z-scheme heterojunction was shown to be beneficial for maximizing the superiority of photo-assisted Fenton-like reaction *** experimental and characterization results confirmed that both non-radicals(^(1)O_(2)) and radicals(SO_(5)^(·-) and SO_(4)^(·-)) were involved in the reaction process and the SO_(5)^(·-)generated by the oxidation of PMS played a crucial role in the TCH *** possible reaction mechanism was finally *** study provided new insight into the z-scheme heterostructure to promote the photo-assisted Fenton-like reaction.

关键词： Peroxymonosulfate activation Photo-assisted Fenton-like reaction z-scheme heterojunction Reaction mechanism Reactive oxygen species

Sequential Growth of Cs_(3)Bi_(2)I_(9)/BiVO_(4)Direct z-scheme heterojunction for Visible-Light-Driven Photocatalytic CO_(2)Reduction

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Transactions of Tianjin University 2023年第6期29卷 462-472页

作者： Long Jiang Hanrui Du Le Li Xiangjiu Guan Yihao zhang Liwei Li Xiaoxu Liu Lei Li Yingcheng Tian Li zhang Shuai Wang Jie Chen Shaohua Shen State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials CNPC Tubular Goods Research InstituteXi’an 710077China International Research Center for Renewable Energy State Key Laboratory of Multiphase Flow in Power EngineeringXi’an Jiaotong UniversityXi’an 710049China School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 710049China CNPC National Engineering Research Center for Oil and Gas Drilling Equipment Co. Ltd.Baoji 721002China China Coal Energy Research Institute Co. Ltd.Xi’an 710049China

The high exciton binding energy and lack of a positive oxidation band potential restrict the photocatalytic CO_(2)reduction efficiency of lead-free Bi-based halide perovskites Cs_(3)Bi_(2)X_(9)(X=Br,I).In this study,a sequential growth method is presented to prepare a visible-light-driven(λ>420 nm)z-scheme heterojunction photocatalyst composed of BiVO_(4)nanocrystals decorated on a Cs_(3)Bi_(2)I_(9)nanosheet for photocatalytic CO_(2)reduction coupled with water *** Cs_(3)Bi_(2)I_(9)/BiVO_(4)z-scheme heterojunction photocatalyst is stable in the gas-solid photocatalytic CO_(2)reduction system,demonstrating a high visible-light-driven photocatalytic CO_(2)-to-CO production rate of 17.5μmol/(g·h),which is approximately three times that of pristine Cs_(3)Bi_(2)I_(9).The high efficiency of the Cs_(3)Bi_(2)I_(9)/BiVO_(4)heterojunction was attributed to the improved charge separation in Cs_(3)Bi_(2)I_(9).Moreover,the z-scheme charge-transfer pathway preserves the negative reduction potential of Cs_(3)Bi_(2)I_(9)and the positive oxidation potential of BiVO_()*** study off ers solid evidence of constructing z-scheme heterojunctions to improve the photocatalytic performance of lead-free halide perovskites and would inspire more ideas for developing leadfree halide perovskite photocatalysts.

关键词： Lead-free halide perovskite z-scheme heterojunction CO_(2)reduction Visible-light photocatalysis Charge transfer